Lock-nut.



A. E. HICKLING & H. LAMB.

LOCK NUT.

APPLICATION FILED FEB.27,1914.

1,210,310. Patented Dec.26,1916.

ALBERT EDGAR HICKLING AND HARRY LAMB, 0F ECCLES, NEAR MANCHESTER,-

ENGLAND.

LOCK-NUT.

Specification of Letters fatent.

Patented Dec. 26, 1916..

Application filed February 27, 1914. Serial No. 821,479.

To all whom it may concern:

Be it known that we, ALBERT EDGAR HICK- LING and HARRY LAMB, of 218Barton Lane, Eccles, near Manchester, England, having hereby inventedcertain new and useful Improvements in Lock-Nuts, (for which we haveobtained a patent in Great Britain, No. 5,179, bearing the date of March5, 1913,) do hereby declare that the following is a full, clear, andexact description of the same.

This invention relates to lock-nuts, and

has for its primary object to provide a locknut wherein the lockingelement, which is integral with the nut is designed or shaped to producea secure and effective locking means without impairing the connectionbetween the nut and element, under the per cussive force necessary tosecure the nut in its locked position. On the other hand the arrangementof the locking element is designed to receive the percussion at the mosteffective angle.

v Other objects are to provide the bolt with means for locating theposition at which the locking may be effected as well as an improvedform of locking groove.

Upon the accompanying drawing which illustrates an example of theinvention, Figure 1 is an exterior View of a bolt and nut with thelatter locked in position thereon. Fig. 2 is an end View. Fig. 3 is apart elevational and part sectional edge View of the improved nut.

a represents the bolt and Z) the nut. The bolt is provided along itsthreaded part with a longitudinal wedge-shaped groove a having a flatbase. This form of groove prevents any tendency of the bolt to split, or

fracture when looking the nut in position its base adjacent to the nutproper, relatively to its outer edge which may be of comparatively smalldimensions but preferably I slightly rounded as shown.

The groove 0. in the bolt extends, or joins into a notch, or groove amade in'the end of the bolt, thus when the nut 72 is required to besecured close to the end of the bolt, and consequently none of thethreaded portion visible, the end groove a? forms an indication as tothe position of the groove a I The conical extension 6 of the nutenables the looking to be made thorough, inasmuch as the mass of metalgradually becoming denser toward the nut, resists all tendency of theextension to fracture, or shear from the nut when a blow is applied bymeans of a chisel, or other tool to lock the nut in 'position. On theother hand the force of the blow acts at such an angle that the metal isover a larger mass of metal than would be Y the case if theextension wasof the same relative thickness throughout. The shape of the groove 0also permits of a firmer keying action between the parts.

The advantages arising from applicants end face groove are many. Thus itserves not only as an indicator where'the looking or unlocking shouldtake place but it also serves particularly as a guide for the unlockingedge of the unlocking tool when the dirt and grime may cover up the endportion of the longitudinal groove when the nut and its conical flangeis near the end of the bolt. when light can not be easily obtained onehas only town the edge of the tool along the end of the face of the boltto unlock the nut which may even be flush with the end of the bolt.

We claim:

In combination a bolt having a longitudinal locking groove and an endface groove arranged radially of the bolt and communicating with saidlongitudinal groove, and a nut having a collar adapted to be keyed intosaid longitudinal groove.

In testimony whereof we aflix our signatures in ,presence of twowitnesses.

ALBERT EDGAR HIOKLING. HARRY LAMB. Witnesses:

MALCOLM SMETHURST, JOHN WILLIAM THonAs.

